Steam-generator.



No. 634,277. Patented 00L 3, |899. G.' W. SHIELDS.

STEAM GENERATUB.

(Application led Aug. 6, 1898,)

Patented oct. a, 1899.52 G. W. SHIELDS.

STEAM GENERAToR.

(Application med Aug. a, 189e.)

2 Sheets-Sheet 2l (NnModeh) WVM/meow "i'arfa k 6MM@ Suva/whoa in@ 4WUNrrn-n STATES PATENT unten.

GEORGE W. SHIELDS, OF LOUISVILLE, KENTUCKY, ASSIGNOR OF ONE-FIFTH TOROBERT M. KELLY AND ROBERT M. KELLY, JR., OF SAME PLACE.

STEAM-G EN ERATOR.

SPECIFICATION forming part of LettersPat-ent No. 634,277', dated October3, 1899. Application tiled August 6, 1898. Serial No.6871906. (Nomodel.)

.o @ZZ wwnt it 791,601/ concern:

Beit known that I, GEORGE W. SH1nLDs,a citizen of the United States,residing at Louisville, in the county of Jefferson and State of 5Kentucky, have invented new and useful Improvements in Steam-Generators,of which the following is a specication.

My invention is an improvement on the steam-generator invented by me forwhich ro Letters Patentofthe United States, numbered 110,298, datedDecember 20, 1870, were issued to me, and is hereinafter fullydescribed, and illustrated in the accompanying drawings, in Which-Figure l is a side elevation with part of my steam-generating apparatusin vertical section to show the construction of valves and connections.Fig. 2 is a top plan View of the grate, tire-bed, and mysteam-generating apzo paratus, showing their relations to each other.

Similarletters refer to similar parts throughout both views.

A represents the lire-bed; B, the boiler; F, the furnace, and E a seriesof lap-Welded pipes placed transversely in the fire-bed, commencing atthe bridge-Wall ct and extending back to the after end of re-bed, asshown in Fig. 2.

O and D are check-valves (shown in vertical section in Fig. l) thatcontrol the flow of 3o Water in the series of pipes E.

H is a mud-drum placed transversely beneath the boiler, with which it isconnected by the pipe or drum-leg h.

G is a circulating-pipe connecting the muddrum H, through thecirculating-valve O and the connecting-pipe e, with the series of pipesE.

O is a vertical chamber placed at one side of the mud-drum H andconnected with it by 4o the pipe g.

p is a cylindrical valve within the chamber O, controlling the apertureof the pipe g, and p' is a screw placed in the top of the chamber O forthe purpose of closing the valve p when desired.

I represents the supply-pipe, through which the water forced into thelower part of the chamberO by the feed-water pump when the valve p isclosed passes through the valve D,

5o the connecting-pipe e, the pipe series E, and

the pipe e into the boiler B, near the waterline. The valves C and D arearranged in reverse order, so that the action of one closes the other,and work automatically.

S is a blow-off cock to relieve the pipes of any sediment that mayaccumulate.

When the feed-pump is not Working, the water from the boiler passes downthrough the pipe or drum-leg h into the drum H and circulating-pipe G,thence through the valve C, and, closing by its weight the valve D,thence by the connecting-pipe e into the first of the series of pipesEat the bridge-wall, and, becoming heated, passes on through the seriesand, rising through the pipe e', empties into the boiler near thewater-line, keeping up a constant circulation and entering the boileralways hot. When the feed- Water pump is working, the valve p in thechamber O is closed, and the water passing through the pipe I and thevalve D closes the valve C and passes through the connecting-pipe e intothe series of pipes E in the fire-bed and, becoming heated, risesthrough the pipe e into the boiler. There is no time that the pipes Eare not full of water. Only one opening in a boiler is necessary toattach my improved generator, and only two other connections arenecessary-one of the pipe G With the muddrum and one of the pipe I withthe valve- Achamber O.

The valve-chamber O, connected with the feed-pump by the pipe I and withthe drum H by the pipe g and containing a check-valve, is part of theusual means of supplying a boiler with Water. The screw p' for fasteningdown the valve is part of my device.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is- 9o l. The combination with a steam-boiler,its furnace, and a discharge-pipe discharging into said boiler, of afeed-water-supply pipe, having an automatic check-valve, acirculatingpipe having an automatic check-valve at one end and its otherend connected With the boiler, said check-valves operating reverselyandby pressure as described, and abranch pipe connecting said feed-Waterand circulating pipes together between said valves and extending to theinlet end of said dischargepipe, substantially as shown and described.

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2. The combination with a steam-boiler, its furnace, pipes E discharginginto the boiler near the water-line and arranged to be heated by thefurnace, a mud-drum, and a pipe leading from the boiler to the mud-drum,of a chamber having openings near its top and bottom, a pipe leadingfrom the upper opening to said mud-drum, a valved circulatingpipeleading outward from said mud-drum, a valved supply-pipe leading fromthe lower opening in said chamber, a branch pipe leading from the spacebetween the valves of said circulating and supply pipes to the inlet endof the pipes E, and a valve in said chamber having its seat between saidopenings, said valve having means for locking it to its seat against thepressure of inflowing water, substantially as described and for thepurposes set forth.

3. The combination with the steam-boiler, it-s furnace, pipes Edischarging into the boiler and heated by said furnace, a mud-drum, and

a pipe leading from the boiler to the muddrum, of a chamber havingopenings nearits top and bottom, a pipe connecting the upper portion ofthe chamber with the mud-drum, a circulating-pipe leading outward fromsaid mud-drum, a supply-pipe leading from the lower opening in saidchamber, said circulating and suppl)7 pipes having opposing ends, anautomatic check-valve at each of said opposing ends, said valves beingoperated reversely and by pressure as described, a branch pipeconnecting said supply-pipes together between said automatic valves andalso leading to the inlet end of said pipe E, and a valve in saidchamber having its seat between said openings.

Subscribed by me in the presence of two witnesses.

- GEORGE W. SHIELDS.

lVitnesses:

GEORGE A. JONES, J r., ALFRED E. BECKMAN.

